Burner



J. H. HUNT BURNER vasis Patented Sept. lll, 1923..

tenses nniiTnn sTnTns PATENT, @einenl JOHN H. lH'` 1\T'.l., 0F DAYTON, OHIO, ASSIGOR TO T'HEvDAYTON ENGINEERING v LABORATORIES COMPANY, A 'CORPORATION'OF OHIO. l

BURNER.

Il@ systems for liquid fuel burners, wherein the 1 fuel is 'supplied to the burner f air jgiresfsiire; v y One objectyf the invention istoprovide improvements in the manner of control of` l1155 the air pressure which forces the fuel to the burner from a source of fuel supply, so that Ithe vair pressure may adjusted to a rela tively'ne degree. 'l 1 Other and further objects andadvantages of the present invention will be apparent from the yfollowing description, reference being had to the accompanying drawings, wherein preferred embodiments of the present invention are clearly shown. These 'embodiments constitute Aimprovements in apparatus disclosed in the copending application of John Good, Serial No. 195,506, filed 0ctober-9, 1917. ln the drawings: l Fig. 1 is an end elevation, partly in .sec-

tion of a burner constructed in accor-dancev indicated. at 45 will be known as the fuel.

Chamber 46 communiwith the present invention; i Fig. 2 is a side elevation of the burner taken on the line 2-2 ofFig, 1';

Fi showgirng a modified form of4 one of the parts thereof; and

Figs. 4 and 5 are sectional views similar to Fig. f 2,- showing modied forms of the invention.y A Referringtothe drawings, 20 indicates as a wholel the' burner and 21 the blower, The

forn'is an air receiving chambera -Body 22 may be ofthe centrifugal type and is driven by an electricl motor or ,other suitable power device 23. Within th'e body- 22 is mounted a shell 24 in-fwhich the coinbustionbfthe fuel takes lace; rThe lspace between the -shell 24 and) the body 22 forms an air receiving chamber 25. The chamberv 2 6y within the blower y for the burner together with a section of' 3 .is a fragmentary view of the burner' burner 20 includes abody or casing 22 which is directly connected with'the lblower which Application led March 27,19193 SerialNo. 285,662.'

the shell 23 willbe known as the combustion chamber. "-f

Air for-combustion purposes will pass' from the 'chamber 25 into the lcombustion chamber^`26 through a series .of slits which l may'be'arranged in any fashion which will insure a good niixture of the air with the fuel, as for example, some of these slits may be arranged as shown at 27, diametrically opposite one another, andothers in spiral fashion as shown at 28, or only spirally arranged slits may be used as shown in Figs. lnstead of these elongated pas'g 4 and- 5. sages, a series of spirally arranged round holes, as shown at 30 in Fig. 3, may be provided for the entrance of combustion air" to the chamber 26. Air .for fuel'atomizing purposes passes through the chamber 25 through a small passage 31 arranged in alignment with the flow of. air from the blower into the chamber 25.`

. A .fuel reservoir 40, provided with a fuel opening 41 closed by screw stopper 42, is

.supported by a -liollow neck" 43 having a flanged portion 44 by means of which the neck is detacliably secured to body 22. Flanged portion 44 provides aclosiire for an opening 29 in the wall of body 22 -andprovides the top lwall of fuel reservoir '40. The chamber included 'within the neck 43 and Vabove the level of the fuel .or passage 47 provided infflanged'portion 44, the opening offwhi'ch is adjusted by -means -of the 4screw 48.` A bleeder-passage 49, provided in neck portion`43, connects the 3i inthe Shell Q4.

The ignition of the 'chamber 46"wi th the. outside atmosphere. The fuel. delivery pipe 50 extends from nearthe'bottom of the reservoir 40 to a point approximately on Ithe level-.of the passage fuel provided for i' electrically by `means of va spark plug 60 which is connectedwith suitable ignition ap'- paratus, not shown, the particular construcdrives air'underpressure linto the air receiving chamber 25,

,Mm tion of which forms no part of this invenf ice oin whicha'part of the air,4

I will pass through .the passages 27 vor 28 into 'in the chamber 46 can be obtained; The air'abovel the 'fuel lcvel'45 in the reserl voir 4Q-being under pressure vin the manner. described,v the fuel .will be forced upwardly.;l

the combustion chamber 26 'there to be mixed with 'atomized fuel and to be consumed. Before air can 'be admitted into the fuel pressure chamber 46 from .the chamber v25,.-

the pressure of the air. must be reduced,- otherwise the fuel will be forced out of the pipe 50 at: too rapid a rate fand under too greata pressure. This reduction in pressure is aecomplishedthrough the -combined elf--A 'feet of the-passages 47 and 49. 0 bviously', a

'at thelesiredrate; and under the' desiredv l level of the'passage-'l' from'whence the 4fuel water' or air oran is. ignitedA 'elsetrillvby means' effi spark' from' the'4 plug .60.' "lheL resulting-'.Hame may I' vided with an 'externally threaded''boss `59 which is centrally bored to provide-for- 4r'ioz-v- -zle 61 having ashoulder 62. 'fitting' against beveled to fit against'the lared-upperend of'Y fuel pipe -63 which. extends downto near. the bottom of reservoir` 64. A nut 65 haying threaded engagement with yboss 59 is lcenl trally bored to provide-'for 4the-extending- Fig. 4 shows a form 'oliiftheliinvention vwherein'the fuel reservoir is' `located-"at a' distance belowthe burner so 4'that'..fuel and air pipes are required. T-he casing25lis pro- 4 the lower end of .boss- 59. Shoulder 62.`is

' therethrough of pipe 6 3),V and is provided with an annular ledge 66 which supports a disc 67. Disc 67 'is centrally bored and countersunk to receive the flared upper end of pipe 63.and -t'oellect a'tight joint between nozzle Gland pipe 63 when the nut 65 is .screwed upwardly on boss 59. Boss 59 is `The' duct 68 i'scontrolled by vscrew 7 2 and' pressureyto 'anyV suitable 3com-'1f .bastion tube'b .jme'anseof bolts 22%?? This.. combustion' tu Ye' maybe inicnttfwithfsure in 'fthe .reservoir the-'adjustin y other suitable heattrans the Arequired pressure .reduction below 'the pressure in air chamber-125 .'for fuel elevatlnglpurposes obtained; by the `cooperation of t is manually controlleddu'ct 68 and a This construction pronides'vfor'lthe con-v centricv relation of pipes' 63 and -70 sov that 'Y in the installation ofthe burner only one pipe connectingthe burner and' .reservoir isl part of the air-entering chamber 46will be* expelled'tothe atmosphere through the pas? sage' 49.l B y'a'djustingv the relation O thef opening .of passage 47 to the passage `49 the". required amount of reduction of air .pPe'SOfeXte'nds directly .from reservo-ir: 64 'up through the body 22 andisiprovidedwith a nozzle 81 extending into the-'burner. Air

ehamber`L25 vis connected 'with reservoir 64 4by air -pipe 82 andyalve'83, Valve 83 is l--provided' with' air` duct 84 controlled by pressure to ,a point approximately at the Screw 85,4 and with al bleeder passage86. The I manually controlledl duct 84. andbleeder 86 will be blown out int 'e form of-.a s pray :of small particles, towards'the incornmg coni-.fA 'zmeans' of t hje aarpassing through theajtoniizing 'orificel'g This fuel' cooperate in the mannerfpreviously descrlbe'd to control ,the'alrfpressure inreservoirv 64 requiredV forfuel elevating purposes.

In each of the forms ofthe invention illustr'ated and described, the pressurein the which arey so' related that to vary the presmust befturned. through arelative y large.n

.-l'shown; and 'described c on'stitute j preferred forms of embodiment of theinvention; it is tof-be understobd that 'other` ormsffmight'be adopted, all-comingwithin .the scope of the Vclaims which follow:

tion 4with a body includingan"air' chaml'jer;l

-v M5 zle extending fromlthe reservoir 1 n tothe thehair chamber to the reservoir; 'and afnozbodygw 'aio tionwith 'a body-. -havingan'air chamber; of

' af part "attached ,to .the body and having an air lpasstge l communicating with the. air

burner.

3. In a liquid .fuel burner, .thecombination with abodyhavin i an air chamberaf" an opening in a wall t ereof; o'fa partde'- tachably secured to the bodyand providingv rea-v memes a closure foi-'said opening, said part having' un air passage leading tosaid amohamber; a fuel reservoir supported by said part; and a nozzle extending from the reservoir into the burner. y

4. ln a liquid fuel burner, the'combination with. a burner body including an air oharnberand having an opening in a Wall of the air chaniber; of a fuel reservoir including a neck portion and a flanged portion providing the top Wall of the reservoir, said fianged portion being secured to the body and providing a closure for said opening, said flanged portion being provided With a ducfl leading from the air chamber` to the reservoir, and said neck portion being provided with a bleeder passage; and a. nozzle extending from -the reservoir. to the burner. e y

5. lin a liquid fuel burner, the combinw tion With a body having an aix' chamber and an opening in a Well thereof; of a part detachably secured to the body and providing a closure for said opening, said part having an air passage leading to saidA air chamber; a fuel reservoir supported by said part; and a nozzle concentric with said part and extending from the reservoir into the buiner.

ln testimony whereof ll ax mysignature.

JOHN H. HUNT. Witnesses:

: HAZEL SoLLENBEnGnn,

Minnnnn PEARL 

